CAAAngularSeparation_SmallestCircle: CAAAngularSeparation_SmallestCircle

In helixcn/skycalc: Computational Astronomy in R based on PJ Naughter's AA+ library

Description

CAAAngularSeparation_SmallestCircle

Usage

CAAAngularSeparation_SmallestCircle(Alpha1, Delta1, Alpha2, Delta2, Alpha3, Delta3, bType1)

Arguments

Alpha1	Alpha1 The first right ascension expressed as an hour angle.
Delta1	Delta1 The first declination in degrees
Alpha2	Alpha2 The second right ascension expressed as an hour angle.
Delta2	Delta2 The second declination in degrees
Alpha3	Alpha3 The third right ascension expressed as an hour angle.
Delta3	Delta3 The third declination in degrees
bType1	bType1 Upon return will be true if the smallest circle is of type 1, otherwise false, implying smallest circle is of type 2.

Value

Returns the diameter of the smallest circle encompassing the 3 points in degrees.

Author(s)

C++ code by PJ Naughter, imported to R by Jinlong Zhang

References

Meeus, J. H. (1991). Astronomical algorithms. Willmann-Bell, Incorporated.

Examples

CAAAngularSeparation_SmallestCircle(Alpha1 = 10, Delta1 = 12, Alpha2 = 6, Delta2 = 11,  Alpha3 = 16, Delta3 = 33, bType1 = TRUE)

helixcn/skycalc documentation built on March 31, 2021, 5:45 a.m.